Title:
METHOD FOR SAFE RECOVERY OF WASTE ELECTRODE PLATES OF LITHIUM ION BATTERIES AND APPLICATION THEREOF
Document Type and Number:
WIPO Patent Application WO/2022/193783
Kind Code:
A1
Abstract:
Provided are a method for the safe recovery of waste electrode plates of lithium ion batteries and an application thereof, relating to the technical field of battery recovery. The method comprises the following steps: crushing waste positive electrode plates and sieving to obtain positive electrode powder A and crushed aluminium slag; mixing the crushed aluminium slag with an acid solution, performing ultrasonic treatment whilst stirring, and then performing wet sieving to obtain aluminium slag and battery powder; washing the obtained aluminium slag with water, then rinsing with an explosion suppressant, centrifuging to obtain explosion-suppressing aluminium slag, and then packaging and compressing to obtain an aluminium slag block; respectively connecting two ends of the aluminium slag block to a positive electrode plate and a negative electrode plate of a direct current electrode, applying current to melt the aluminium slag and, after cooling, obtaining a safe aluminium slag block. Washing with a saturated calcium hydroxide solution makes residual acid react with the saturated calcium hydroxide solution to neutralise the acid during the process of aluminium slag production, preventing the aluminium slag from reacting with the residual acid to avoid the release of hydrogen and the generation of heat, ensuring the safety of the storage process.
Inventors:
XIE YINGHAO (CN)
YU HAIJUN (CN)
LI CHANGDONG (CN)
LIU SHUMIN (CN)
YU HAIJUN (CN)
LI CHANGDONG (CN)
LIU SHUMIN (CN)
Application Number:
PCT/CN2021/142799
Publication Date:
September 22, 2022
Filing Date:
December 30, 2021
Export Citation:
Assignee:
GUANGDONG BRUNP RECYCLING TECHNOLOGY CO LTD (CN)
HUNAN BRUNP RECYCLING TECH CO LTD (CN)
HUNAN BRUNP VEHICLES RECYCLING CO LTD (CN)
HUNAN BRUNP RECYCLING TECH CO LTD (CN)
HUNAN BRUNP VEHICLES RECYCLING CO LTD (CN)
International Classes:
H01M10/54
Foreign References:
| CN113131030A | 2021-07-16 | |||
| CN107732352A | 2018-02-23 | |||
| CN104526114A | 2015-04-22 | |||
| CN111908491A | 2020-11-10 | |||
| JP2019169308A | 2019-10-03 |
Attorney, Agent or Firm:
ADVANCE CHINA IP LAW OFFICE (CN)
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